Answer in one word.
Sounds above the frequency of 20,000 Hz. _________

Explanation

To answer the question "Sounds above the frequency of 20,000 Hz," we can follow these steps:

1. **Understand the Frequency Range**: Recognize that sound frequencies are measured in Hertz (Hz), where 1 Hz equals one oscillation per second.

2. **Identify the Threshold**: The question specifies a frequency greater than 20,000 Hz.

3. **Define the Terms**:
- Sounds with frequencies below 20 Hz are called **infrasonic**.
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